The zygomatic bone is one of the skulls of the face, which is located in the front of the middle part of the face and below the orbit. It is rhombic and forms bony protrusions on the cheeks. There are four processes on the cheekbone, namely, the anterior sphenoid process, the mandibular process, the temporal process and the orbital process. The temporal process of zygomatic bone connects the zygomatic process of temporal bone backward to form zygomatic arch.

Zygomatic bone and zygomatic arch are important skeletal supports in the middle part of the face and an important part of the human facial contour. There are three main physiological functions. One is protection. These two structures are located in the most prominent parts on both sides of the face. When the external force hits the face from the side, it protects the maxillary sinus and temporal muscle, and then protects the lateral wall of the skull.

The second function is to form the contours of both sides of the middle part of the face. The difference of its size and shape greatly affects the contour and appearance of the face, so changing its shape and convexity can obviously change the appearance of the face. The third function is to separate the deep temporal muscle from the superficial skin.

When we eat, we can notice that the temples on both sides are moving, but we won't notice that the skin at the zygomatic arch is moving. In fact, the temporal muscle runs under the zygomatic arch. When the zygomatic arch is missing for various reasons, you will notice that the skin in front of the external auditory canal is driven by its deep temporal muscle when eating.